Fix lint (#1692)

Author: fmassa

references/detection/train.py

@@ -108,7 +108,7 @@ def main(args):
 
     # lr_scheduler = torch.optim.lr_scheduler.StepLR(optimizer, step_size=args.lr_step_size, gamma=args.lr_gamma)
     lr_scheduler = torch.optim.lr_scheduler.MultiStepLR(optimizer, milestones=args.lr_steps, gamma=args.lr_gamma)
-    
+
     if args.resume:
         checkpoint = torch.load(args.resume, map_location='cpu')
         model_without_ddp.load_state_dict(checkpoint['model'])